decoder/gme,input/curl,...: use static buffers instead of g_strdup_printf()

src/decoder/FfmpegDecoderPlugin.cxx

@@ -31,8 +31,6 @@
 #include "util/Domain.hxx"
 #include "LogV.hxx"
 
-#include <glib.h>
-
 #include <assert.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -84,10 +82,11 @@ mpd_ffmpeg_log_callback(gcc_unused void *ptr, int level,
 		cls = *(const AVClass *const*)ptr;
 
 	if (cls != NULL) {
-		char *domain = g_strconcat(ffmpeg_domain.GetName(), "/", cls->item_name(ptr), NULL);
+		char domain[64];
+		snprintf(domain, sizeof(domain), "%s/%s",
+			 ffmpeg_domain.GetName(), cls->item_name(ptr));
 		const Domain d(domain);
 		LogFormatV(d, import_ffmpeg_level(level), fmt, vl);
-		g_free(domain);
 	}
 }
 
@@ -351,12 +350,10 @@ ffmpeg_probe(struct decoder *decoder, struct input_stream *is)
 
 	Error error;
 
-	unsigned char *buffer = (unsigned char *)g_malloc(BUFFER_SIZE);
+	unsigned char buffer[BUFFER_SIZE];
 	size_t nbytes = decoder_read(decoder, is, buffer, BUFFER_SIZE);
-	if (nbytes <= PADDING || !is->LockSeek(0, SEEK_SET, error)) {
-		g_free(buffer);
-		return NULL;
-	}
+	if (nbytes <= PADDING || !is->LockSeek(0, SEEK_SET, error))
+		return nullptr;
 
 	/* some ffmpeg parsers (e.g. ac3_parser.c) read a few bytes
 	   beyond the declared buffer limit, which makes valgrind
@@ -369,10 +366,7 @@ ffmpeg_probe(struct decoder *decoder, struct input_stream *is)
 	avpd.buf_size = nbytes;
 	avpd.filename = is->uri.c_str();
 
-	AVInputFormat *format = av_probe_input_format(&avpd, true);
-	g_free(buffer);
-
-	return format;
+	return av_probe_input_format(&avpd, true);
 }
 
 static void

src/decoder/GmeDecoderPlugin.cxx

@@ -53,10 +53,12 @@ get_container_name(const char *path_fs)
 {
 	const char *subtune_suffix = uri_get_suffix(path_fs);
 	char *path_container = g_strdup(path_fs);
-	char *pat = g_strconcat("*/" SUBTUNE_PREFIX "???.",
-				subtune_suffix, nullptr);
+
+	char pat[64];
+	snprintf(pat, sizeof(pat), "%s%s",
+		 "*/" SUBTUNE_PREFIX "???.",
+		 subtune_suffix);
 	GPatternSpec *path_with_subtune = g_pattern_spec_new(pat);
-	g_free(pat);
 	if (!g_pattern_match(path_with_subtune,
 			     strlen(path_container), path_container, nullptr)) {
 		g_pattern_spec_free(path_with_subtune);
@@ -79,10 +81,12 @@ static int
 get_song_num(const char *path_fs)
 {
 	const char *subtune_suffix = uri_get_suffix(path_fs);
-	char *pat = g_strconcat("*/" SUBTUNE_PREFIX "???.",
-				subtune_suffix, nullptr);
+
+	char pat[64];
+	snprintf(pat, sizeof(pat), "%s%s",
+		 "*/" SUBTUNE_PREFIX "???.",
+		 subtune_suffix);
 	GPatternSpec *path_with_subtune = g_pattern_spec_new(pat);
-	g_free(pat);
 
 	if (g_pattern_match(path_with_subtune,
 			    strlen(path_fs), path_fs, nullptr)) {
@@ -235,13 +239,13 @@ gme_scan_file(const char *path_fs,
 	if (ti->song != nullptr) {
 		if (gme_track_count(emu) > 1) {
 			/* start numbering subtunes from 1 */
-			char *tag_title =
-				g_strdup_printf("%s (%d/%d)",
-						ti->song, song_num + 1,
-						gme_track_count(emu));
+			char tag_title[1024];
+			snprintf(tag_title, sizeof(tag_title),
+				 "%s (%d/%d)",
+				 ti->song, song_num + 1,
+				 gme_track_count(emu));
 			tag_handler_invoke_tag(handler, handler_ctx,
 					       TAG_TITLE, tag_title);
-			g_free(tag_title);
 		} else
 			tag_handler_invoke_tag(handler, handler_ctx,
 					       TAG_TITLE, ti->song);

src/decoder/sidplay_decoder_plugin.cxx

@@ -359,11 +359,12 @@ sidplay_scan_file(const char *path_fs,
 		title="";
 
 	if(info.songs>1) {
-		char *tag_title=g_strdup_printf("%s (%d/%d)",
-			title, song_num, info.songs);
+		char tag_title[1024];
+		snprintf(tag_title, sizeof(tag_title),
+			 "%s (%d/%d)",
+			 title, song_num, info.songs);
 		tag_handler_invoke_tag(handler, handler_ctx,
 				       TAG_TITLE, tag_title);
-		g_free(tag_title);
 	} else
 		tag_handler_invoke_tag(handler, handler_ctx, TAG_TITLE, title);
 
@@ -373,9 +374,9 @@ sidplay_scan_file(const char *path_fs,
 				       info.infoString[1]);
 
 	/* track */
-	char *track=g_strdup_printf("%d", song_num);
+	char track[16];
+	sprintf(track, "%d", song_num);
 	tag_handler_invoke_tag(handler, handler_ctx, TAG_TRACK, track);
-	g_free(track);
 
 	/* time */
 	int song_len=get_song_length(path_fs);